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CHRISTENSEN DIAMOND PROD CO

Overview
  • Total Patents
    165
About

CHRISTENSEN DIAMOND PROD CO has a total of 165 patent applications. Its first patent ever was published in 1956. It filed its patents most often in United States, France and Germany. Its main competitors in its focus markets civil engineering, machines and machine tools are DIAMANT BOART SA, GROUPE FORDIA INC and ALFRED STAPF.

Patent filings in countries

World map showing CHRISTENSEN DIAMOND PROD COs patent filings in countries

Patent filings per year

Chart showing CHRISTENSEN DIAMOND PROD COs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Christensen Frank L 20
#2 Ostertag Alfred 10
#3 Mabey Donald H 9
#4 Mori Takeshi 9
#5 Austin Benjamin L 7
#6 Ritter Marcel Georges 5
#7 Link Howard D 5
#8 Jurgens Rainer 5
#9 Rowley David S 5
#10 Bridwell H 5

Latest patents

Publication Filing date Title
DE2718482A1 Diamond core drilling bit - with core catcher of inward deflected sprung tongues in core barrel
US3993368A Tool joint wear protectors
DE2523074A1 PROCESS AND EQUIPMENT FOR MANUFACTURING WEAR-RESISTANT BODIES, IN PARTICULAR FOR DEEP DRILLING TECHNOLOGY
SU902676A3 Device for installing stabilizer on drilling column
US3938853A Shrink-fit sleeve apparatus for drill strings
US3918210A Apparatus for milling faces of masonry blocks
CA979254A Apparatus for milling faces of masonry blocks
DE2313664A1 HANDLEBAR WITH THREADED CONNECTORS
DE2311359A1 STABILIZER FOR DRILL LINE
FR2169577A5 Abrasive particles for grinding tools - encapsulated in metal
US3818997A Apparatus and method for situ sharpening of bore hole bits
US3757879A Drill bits and methods of producing drill bits
US3757878A Drill bits and method of producing drill bits
DE2238785A1 PIPE CONNECTOR
US3825083A Drill bit and stabilizer combination
US3871840A Abrasive particles encapsulated with a metal envelope of allotriomorphic dentrites
US3841852A Abraders, abrasive particles and methods for producing same
US3747276A Method and apparatus for contouring and sharpening circular saws
US3727704A Diamond drill bit
US3709308A Diamond drill bits